Dynamometer



(NoModL) v J. MQCLOSKEY.

DYNAMOMETER.

Patented Nov. 6, 1883.

Fig. 5.

WITNEEEEE INVENTEIIR UNI ED STATES PATENT OF ICE.

JOHN MOCLOSKEY, or BOSTON, MASSACHUSETTS. J

'DYNAMOMETER.

SPECIFICATION forming part" of Letters Patent No. 287,841, dated November 6, 1883.

Application filed August 27, 1883. (N 0 mcdel.) V 7 View of the same.

A and A are the ends of belt, and a a are the lacing-holes.

B is a horseshoeshaped piece of metal provided throughout its length'with the groove 12, into which is slidthe plate 0, of similar shape, and provided with a scale, 0, say of from one to sixty on a single inch of its length, said scale representing pounds.

D is a spring whose ends (2 are bent, as shown, so as to pass through the belt, and backagain, by means of the lacing-holes a. The spring D d is placed in the lacing-holes, (from which the lacing hasbeen removed,) as shown, and the horseshoe-plates B 0 applied and pushed inward until the portions (1 of the spring touch the outer ends of their slots. The pulley is then started and stopped, and the point on the scale 0, next the plate B, noted,

the spring having drawn the plates B O apart to that extent, the fit of said plates being such as to produce friction enough to hold them in the extreme position-say that shown in Fig. 1. The Work is then applied to-the pulley, and it is started again and stopped, the result being that the plates 13 G are drawn still further apartsay as shown in Fig. 2. By sub tracting the number of pounds indicated in Fig. 1 from the number indicated in Fig. i 2 the amount of power necessary to do the work is ascertained. The speed of the belt will give the distance the power is transmitted.

A dynamometer is applied, or, at least, aspring,

for each inch in width of the belt. A pin, 6, or other suitable-device is applied to each end (I of the spring, to'prevent its separation from the plates B 0, care being had to allow suffi'cient space, so that the movement of said pins, as the spring contracts with the stoppage of the belt, win noteffect the plates B c.

The device is placed on the outside of the belt, so as not to strike the pulley.

Having thus fully described my invention,

what I claim, and desire to secure by Letters Patent, is-' 1 The herein-described improved dynamome: ter, consisting of the spring D, provided with the bent ends d, the grooved plate 13, and sliding plate 0, provided with-a suitable scale, said plates being provided with openings for the ends (1 of the spring, substantially as and for thepurpose set forth.

I JOHN eoLosKEYf Witnesses:

HENRY W. WILLIAMs, J OSEPH ISHBAUGH. 

